Syntax error when using `is defined` with a `filter` #1226

ccutrer · 2024-12-09T17:45:38Z

Template:

  {% if value_json.name | first is defined %}a{% else %}b{% endif %}

With binding:

{
  "name": [ "c" ]
}

raises com.hubspot.jinjava.interpret.FatalTemplateErrorsException: Error parsing 'value_json.name | first is defined': syntax error at position 27, encountered 'is', expected '}'

This works in Python Jinja. I can work around with parentheses:

{% if (value_json.name | first) is defined %}a{% else %}b{% endif %}

The text was updated successfully, but these errors were encountered:

Jinjava (the Jinja implementation openHAB uses) has an issue with using `is defined` on a filter (see HubSpot/jinjava#1226). Using parentheses works around the issue, and is still compatible with Home Assistant's reference Python implementation.

ccutrer mentioned this issue Dec 9, 2024

fix(openhab): fix syntax error in event value_template Koenkk/zigbee2mqtt#25140

Merged

jasmith-hs linked a pull request Dec 13, 2024 that will close this issue

Fix filter and exptest chaining #1228

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Syntax error when using `is defined` with a `filter` #1226

Syntax error when using `is defined` with a `filter` #1226

ccutrer commented Dec 9, 2024

Syntax error when using is defined with a filter #1226

Syntax error when using is defined with a filter #1226

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ccutrer commented Dec 9, 2024

Syntax error when using `is defined` with a `filter` #1226

Syntax error when using `is defined` with a `filter` #1226